Let $\mathrm { M } = \{ 1,2,3 , \ldots , 16 \}$ and R be a relation on M defined by xRy if and only if $4 y = 5 x - 3$. Then, the number of elements required to added in R to make it symmetric is (A) 3 (B) 2 (C) 5 (D) 4
Let $\mathrm { M } = \{ 1,2,3 , \ldots , 16 \}$ and R be a relation on M defined by xRy if and only if $4 y = 5 x - 3$. Then, the number of elements required to added in R to make it symmetric is
(A) 3
(B) 2
(C) 5
(D) 4